123 citations · 342 across the 17 of their papers we have counts for
6 papers · 1 filter
Massive Be and Oe stars at low metallicity and long gamma ray bursts
Christophe Martayan, Jean Zorec, Dietrich Baade +3
According to recent theoretical studies, the progenitors of Long Gamma Ray Bursts should be very fast rotating stars, massive enough but not so for collapsing into a black hole. In…
Evolution of massive Be and Oe stars at low metallicity towards the Long Gamma Ray bursts\footnote{Based on ESO runs 069.D-0275(A), 072.D-0245(A) and (C).}
Christophe Martayan, Jean Zorec, Dietrich Baade +3
Several studies have shown recently that at low metallicity B-type stars rotate faster than in environments of high metallicity. This is a typical case in the SMC. As a consequence…
X-shooter, NACO, and AMBER observations of the LBV Pistol Star \footnote{Based on ESO runs 85.D-0182A, 085.D-0625AC}
Christophe Martayan, Ronny Blomme, Jean-Baptiste Le Bouquin +15
We present multi-instruments and multi-wavelengths observations of the famous LBV star Pistol Star. These observations are part of a larger program about early O stars at different…
Massive Oe/Be stars at low metallicity: Candidate progenitors of long GRBs?
Christophe Martayan, Dietrich Baade, Jean Zorec +3
At low metallicity the B-type stars rotate faster than at higher metallicity, typically in the SMC. As a consequence, it was expected a larger number of fast rotators in the SMC th…
Review about populations of Be stars: stellar evolution of extreme stars
Christophe Martayan, Thomas Rivinius, Dietrich Baade +2
Among the emission-line stars, the classical Be stars known for their extreme properties are remarkable. The Be stars are B-type main sequence stars that have displayed at least on…
Can massive Be/Oe stars be progenitors of long gamma ray bursts?
Christophe Martayan, Jean Zorec, Yves Fremat +1
Context: The identification of long-gamma-ray-bursts (LGRBs) is still uncertain, although the collapsar engine of fast-rotating massive stars is gaining a strong consensus. Aims: W…